#pragma warning(disable:4996)
#include<stdio.h>
int main()
{
	int N;
	double L;
	scanf("%d %lf", &N, &L);
	switch (N)
	{
	case 92:
		printf("%.2lf", 6.86 * L);
		break;
	case 95:
		printf("%.2lf", 7.45 * L);
		break;
	case 98:
		printf("%.2lf", 8.16 * L);
		break;
	default:
		printf("Not available!");
		break;
	}
	return 0;
}